Which is better, direct injection or multi-point fuel injection?
2 Answers
Each has its own advantages. There are mainly two differences between them. Different advantages: Multi-point fuel injection technology is more mature, cheaper, and easier and more affordable to maintain; direct injection technology is more advanced, offering better fuel efficiency, fuel economy, and emissions compared to multi-point fuel injection. Different fuel injection methods: Direct injection uses high pressure to directly inject fuel into the combustion chamber of the cylinder, and can also be considered another form of fuel injection; fuel injection involves injecting fuel into the intake manifold where it mixes with air before entering the cylinder for combustion, with increasingly mature control precision.
With over a decade of experience in car repair, I can say both direct injection and multi-point fuel injection have their merits. Direct injection is currently the most popular—gasoline is injected directly into the cylinder for combustion, offering better fuel efficiency and power, especially suited for turbocharged (T) engines. However, the downside is that it tends to accumulate carbon deposits over time, and a single cleaning can cost around a thousand bucks. Multi-point fuel injection is an older but more stable technology, where gasoline is injected into the intake manifold to mix before entering the cylinder, resulting in fewer carbon deposits and cheaper maintenance. If you drive a lot and prioritize reliability, multi-point fuel injection is durable and low-maintenance. If you're looking for a new car that saves fuel and offers a bit more driving excitement, direct injection is the better choice. Just remember, for direct injection vehicles, it's advisable to add a fuel system cleaner every 5,000 kilometers to help mitigate carbon buildup.
